Stapler



FIG. 1 is a perspective view of the front, left and top of a stapler showing my new design;

FIG. 2 is a perspective view of the rear, right and top thereof;

FIG. 3 is a front view thereof, a rear view being a mirror image thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The elements shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a stapler, as shown and described. 